title: Organization of the diversity--joining region in rabbit immunoglobulin heavy chains as revealed by cleavage of a specific methionine residue in a100 allotype.
abstract: Three anti-micrococcus antibodies of restricted heterogeneity have been isolated from the antisera of homozygous a100/a100 rabbits. Heavy chains contained an unusual methionine residue at position 87 that may correlate with the a100 specificity. From this position, the sequence of a stretch of 35-50 amino acid residues was determined, permitting the definition of variable (V), diversity(D), and joining (J) segments in rabbit Ig heavy chains, with their most probable boundaries. Rabbit D regions so defined appear to be highly variable, both in sequence and in length, which varies, in the heavy chains analyzed, between 6 and 11 residues. The J regions are highly homologous to the mouse J2 segment.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D003488:Cyanogen Bromide; D006720:Homozygote; D007126:Immunoglobulin Allotypes / Q000235:genetics; D007143:Immunoglobulin Heavy Chains / Q000235:genetics; D007147:Immunoglobulin Light Chains; D010446:Peptide Fragments / Q000032:analysis; D011817:Rabbits
chemical_list: D007126:Immunoglobulin Allotypes; D007143:Immunoglobulin Heavy Chains; D007147:Immunoglobulin Light Chains; D010446:Peptide Fragments; D003488:Cyanogen Bromide